export class HelperFunctions {

  public static scroll() {
     HelperFunctions.scrollTo(0,0);
  }
  public static scrollTo(x,y) {
    if (typeof document !== 'undefined') {
      window.scrollTo(x,y);
    }
  }

  public static scrollToId(elementId:string) {
    if (typeof document !== 'undefined' && document.getElementById(elementId)) {
      document.getElementById(elementId).scrollIntoView();
    }
  }
  public static isTiny(url: string) {
    return (url.indexOf('tinyurl.com') !== -1);
  }

  public static copy(obj: any): any {
    let copy;

    // Handle the 3 simple types, and null or undefined
    if (null == obj || "object" != typeof obj) return obj;

    // Handle Date
    if (obj instanceof Date) {
      copy = new Date();
      copy.setTime(obj.getTime());
      return copy;
    }

    // Handle Array
    if (obj instanceof Array) {
      copy = [];
      for (let i = 0, len = obj.length; i < len; i++) {
        copy[i] = HelperFunctions.copy(obj[i]);
      }
      return copy;
    }

    // Handle Map
    if (obj instanceof Map) {
      return new Map(obj.entries());
    }

    // Handle Object
    if (obj instanceof Object) {
      copy = {};
      for (let attr in obj) {
        if (obj.hasOwnProperty(attr)) {
          copy[attr] = HelperFunctions.copy(obj[attr]);
        }
      }
      return copy;
    }
    throw new Error("Unable to copy obj! Its type isn't supported.");
  }

  public static encodeArray(elements: string[]): string[] {
    let encoded: string[] = [];
    elements.forEach(element => {
      encoded.push(encodeURIComponent(element));
    });
    return encoded;
  }
}